The colour of our eyes is determined through various aspects and both dominant and recessive genes can affect the eye colour. Melanin however, is the main reason behind pigmentation across the body and it is made up of the colours black and yellow of which different combinations decipher the eye colour.
The answer is essentially yes. If both the parents have brown eyes, the child may have blue eyes if blue eyes are contained by a grandparent. If one parent has parents with both brown and blue eyes, they will carry genes for eye colours Bb (‘B’ standing for brown and ‘b’ for blue). If the other parent also carries genes Bb, the child may have blue eyes as it is a recessive gene. Both parents must carry the recessive gene.
If both parents have brown eyes, it is obviously much more likely that their child will have brown eyes but if they carry Bb, there is a 25% chance their child will not have brown eyes. Blue eyed parents may also have a child with brown eyes for the same reasons.
The gene that affects eye colour is the OCA2 gene on chromosome 15. The strength of this gene affects the colour of the eyes, I.e. If the gene is weaker, the eye will be closer to blue. This then means if it is stronger, the eye will be more brown.
People learn about eye colour mainly from a plan that was devised in 1907 by G.C Davenport and C.B Davenport. This model for eye colour suggested that brown eyes are more dominant than blue eyes and hence all brown eyes would dominate over blue coloured eyes. This statement is still believed by people today though it is done so wrongly.
It is fairly common for two parents with brown eyes to have a blue eyed child.
The answer is essentially yes. If both the parents have brown eyes, the child may have blue eyes if blue eyes are contained by a grandparent. If one parent has parents with both brown and blue eyes, they will carry genes for eye colours Bb (‘B’ standing for brown and ‘b’ for blue). If the other parent also carries genes Bb, the child may have blue eyes as it is a recessive gene. Both parents must carry the recessive gene.
If both parents have brown eyes, it is obviously much more likely that their child will have brown eyes but if they carry Bb, there is a 25% chance their child will not have brown eyes. Blue eyed parents may also have a child with brown eyes for the same reasons.
The gene that affects eye colour is the OCA2 gene on chromosome 15. The strength of this gene affects the colour of the eyes, I.e. If the gene is weaker, the eye will be closer to blue. This then means if it is stronger, the eye will be more brown.
People learn about eye colour mainly from a plan that was devised in 1907 by G.C Davenport and C.B Davenport. This model for eye colour suggested that brown eyes are more dominant than blue eyes and hence all brown eyes would dominate over blue coloured eyes. This statement is still believed by people today though it is done so wrongly.
It is fairly common for two parents with brown eyes to have a blue eyed child.